在列表视图中searchview结果，但不突出显示结果

Question

我创建了一个searchview，当我键入一个单词并从键盘按ENTER键时，结果将在3或4秒内显示在列表视图中。所以我想插入一个progres微调直到结果填充。另外我想尝试在列表视图中突出显示结果中的搜索词。我使用“SpannableString highlightKeyword”，但无法突出显示结果搜索词，我尝试了很多方法后跟几个网站，但没有发生。我无法弄清楚错误在哪里。下面是我的代码： mainactivity.java：

public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener { 

// Declare Variables 
ListView list; 
ListViewAdapter adapter; 
SearchView editsearch; 
String[] animalNameList; 
ArrayList<AnimalNames> arraylist = new ArrayList<AnimalNames>(); 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 


    Resources res = getResources(); 

    String[] animalNameList = res.getStringArray(R.array.animalNameList); 



    // Locate the ListView in listview_main.xml 
    list = (ListView) findViewById(R.id.listview); 

    for (int i = 0; i < animalNameList.length; i++) { 
     AnimalNames animalNames = new AnimalNames(animalNameList[i]); 
     // Binds all strings into an array 
     arraylist.add(animalNames); 
    } 

    // Pass results to ListViewAdapter Class 
    adapter = new ListViewAdapter(this, arraylist); 

    // Binds the Adapter to the ListView 
    list.setAdapter(adapter); 

    // Locate the EditText in listview_main.xml 
    editsearch = (SearchView) findViewById(R.id.search); 
    editsearch.setOnQueryTextListener(this); 

} 

@Override 
    public boolean onQueryTextSubmit(String newText) { 
    String text = newText; 
    adapter.filter(text); 

    return false; 
} 

@Override 
public boolean onQueryTextChange(String newText) { 

    return false; 
} 

===== ListviewAdapter.java：

public class ListViewAdapter extends BaseAdapter { 

// Declare Variables 

Context mContext; 
LayoutInflater inflater; 
private List<AnimalNames> animalNamesList = null; 
private ArrayList<AnimalNames> arraylist; 

public ListViewAdapter(Context context, List<AnimalNames> animalNamesList) { 
    mContext = context; 
    this.animalNamesList = animalNamesList; 
    inflater = LayoutInflater.from(mContext); 
    this.arraylist = new ArrayList<AnimalNames>(); 
    this.arraylist.addAll(animalNamesList); 
} 

public class ViewHolder { 
    TextView name; 
} 

@Override 
public int getCount() { 
    return animalNamesList.size(); 
} 

@Override 
public AnimalNames getItem(int position) { 
    return animalNamesList.get(position); 
} 

@Override 
public long getItemId(int position) { 
    return position; 
} 

public View getView(final int position, View view, ViewGroup parent) { 
    final ViewHolder holder; 
    if (view == null) { 
     holder = new ViewHolder(); 
     view = inflater.inflate(R.layout.listview_item, null); 
     // Locate the TextViews in listview_item.xml 
     holder.name = (TextView) view.findViewById(R.id.name); 
     view.setTag(holder); 
    } else { 
     holder = (ViewHolder) view.getTag(); 
    } 

    // Set the results into TextViews 
    holder.name.setText(animalNamesList.get(position).getAnimalName()); 


    return view; 
} 


// Filter Class 
public void filter(String charText) { 
    charText = charText.toLowerCase(Locale.getDefault()); 
    animalNamesList.clear(); 
    if (charText.length() == 0) { 
     animalNamesList.addAll(arraylist); 
    } else { 
     for (AnimalNames wp : arraylist) { 
      if (wp.getAnimalName().toLowerCase(Locale.getDefault()).contains(charText)) { 
       animalNamesList.add(wp); 
      } 
     } 
    } 
    notifyDataSetChanged(); 
} 


////Here My problem starts : 

public static SpannableString highlightKeyword(CharSequence text, Pattern p, int fgcolor, int bgcolor) { 
    SpannableString ss = new SpannableString(text); 

    ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE}); 

    int start = 0; 
    int end; 
    Matcher m = p.matcher(text); 
    while (m.find(start)) { 
     start = m.start(); 
     end = m.end(); 

     BackgroundColorSpan bgspan = new BackgroundColorSpan(bgcolor); 
     ss.setSpan(bgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); 
     ForegroundColorSpan fgspan = new ForegroundColorSpan(fgcolor); 
     ss.setSpan(fgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); 

     start = end; 
    } 

    return ss; 
} 


////But even did not the result word highlighted. 

在此先感谢。

Answer 1

Alhamdulillah，最后我在google上找到了我的答案。在getview()方法内高亮定制适配器。如下：

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    View view; 
    TextView text; 

    if (convertView == null) { 
     view = mInflater.inflate(R.layout.list_item, null); 
    } else { 
     view = convertView; 
    } 

    try { 
     if (mFieldId == 0) { 
      // If no custom field is assigned, assume the whole resource is a TextView 
      text = (TextView) view; 
     } else { 
      // Otherwise, find the TextView field within the layout 
      text = (TextView) view.findViewById(mFieldId); 
     } 
    } catch (ClassCastException e) { 
     Log.e("ArrayAdapter", "You must supply a resource ID for a TextView"); 
     throw new IllegalStateException(
       "ArrayAdapter requires the resource ID to be a TextView", e); 
    } 

    // HIGHLIGHT... 



    String fullText = getItem(position); 
    if (mSearchText != null && !mSearchText.isEmpty()) { 
     int startPos = fullText.toLowerCase(Locale.US).indexOf(mSearchText.toLowerCase(Locale.US)); 
     int endPos = startPos + mSearchText.length(); 

     if (startPos != -1) { 
      Spannable spannable = new SpannableString(fullText); 
      ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE}); 
      TextAppearanceSpan highlightSpan = new TextAppearanceSpan(null, Typeface.BOLD, -1, blueColor, null); 
      spannable.setSpan(highlightSpan, startPos, endPos, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); 
      text.setText(spannable); 

     } else { 
      text.setText(fullText); 
      } 
    } else { 
     text.setText(fullText); 


    } 


    return view; 
}